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Geolinking contentExperiments in connecting virtual and physical places
Patrick H. Lauke / Institutional Web Management Workshop 2007 / York
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Outline● Google Maps and Google Earth● Geo metadata for web sites/pages● Flickr - now also for non-geeks● Microformats● Extending XML
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Google Maps and Google Earth● What's happening at institutional level at Salford?
● Early prototype for campus map (Jan 2005)● On ice (beta) since then, but now being revived● http://www.salford.ac.uk/travel/google_map/
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Google Maps and Google Earth
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Google Maps and Google Earth
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Google Maps and Google Earth
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Google Maps and Google Earth● Challenges to build?
● Acquiring geo data● Integrating into web pages
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Google Earth as authoring tool
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Google Earth as authoring tool
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Google Maps API● http://www.google.com/apis/maps/documentation/● Customisation to read KML files directly● Tweaks to automagically determine center point
(zoom level in next round of tweaks)
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Potential issues?● Innovative?
● Maybe in 2005...● Geo data easy to maintain?
● Separate KML file● Accessibility of interface?
● http://blogs.cetis.ac.uk/accessibility/2007/01/29/can-you-really-have-an-accessible-google-map/
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Geo metadata for web sites/pages● ...or how I waste my spare time● http://geourl.org
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geourl.org in all its glory
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geourl.org process● Find your coordinates● Add relevant META elements to page/site● Submit your site to geourl.org
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geourl.org META<meta name="geo.position” content="53.483541;-2.270666" /><meta name="ICBM" content="53.483541,-2.270666" /><meta name="DC.title" content="University of Salford | A
Greater Manchester University" />
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geourl.org in action - near URL
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geourl.org in action - near LAT/LONG
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geourl.org - but is it useful?● On its own, use is quite limited
● Not really aimed at end user - just the geeks?● Interface not intuitive● Relies on sites being tagged and submitted
● However...● Good data repository (while it's up)● Can output RSS ... transformable / mash-up-able● Some sites added the META, which can be exposed
to user
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Transformers...● Converting RSS (an XML format) into KML (another
XML format)● XSLT - powerful and standardised● http://www.splintered.co.uk/experiments/77/
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GeoURL to Google Earth
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GeoURL to Google Earth
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Still fairly niche...● ...but imagine the possibilities
● pages/sites with standardised geo META● repository for this information (harvested?)● XML output and transformation● Google Earth, Google Maps, etc for end user
presentation
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ICBM/geo.location data for end-users?● Early experimentation with Firefox extensions
● Detect META in current page● Make data useful to end-user● http://www.splintered.co.uk/experiments/71/
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Firefox GeoURL extension in action
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Firefox GeoURL extension in action
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Beyond browser extensions● Making the META information useful does not have to
happen at browser extension level● Could build a web-based tool/script:
● Pass it your URL● Have the user sent to relevant map
● Important bit: your geo data is embedded in your page's HEAD, not in a separate file
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Flickr - now also for non-geeks● Good example of end-user friendly geolocation
● Used to be niche: hand-tagging images● Now with WYSIWYG functionality● With certain cameras/phones: no end-user
involvement necessary
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Flickr - hand-tagging of old
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Flickr - now WYSIWYG
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Flickr - end-user friendly
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Flickr + Google Maps + ...● Geotagged photos can be put to use
● http://www.flickr.com/services/api/● Mash-up with campus map? UK-wide map?
● Flickr as repository is extensible● Machine tags - roll your own mash-up friendly
categorisation● http://www.revish.com - book:isbn=XXXXXXX● For universities ... institution code?
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Microformats● Extending HTML usefulness via current technologies● Embedding machine-readable data in pages● http://microformats.org/wiki/geo
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Simple geo microformat examples<div class="geo">GEO:<span class="latitude">37.386013</span>, <span class="longitude">-122.082932</span></div>
<div class="geo"><abbr class="latitude" title="37.408183">N 37° 24.491</abbr><abbr class="longitude" title="-122.13855">W 122° 08.313</abbr></div>
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Why microformats?● Jeremy Keith http://adactio.com/ : 'Your page becomes
your API' - geo data not in a separate file● Can be piped through a script to extract data
● PHP5 - http://allinthehead.com/hkit/ (only vcard microformat at the moment, but extensible)
● If using XHTML - could use XSLT● Firefox 3.0 to support microformats natively (in the
meantime, there's Operator)● Accessibility issues?
http://www.webstandards.org/2007/04/27/haccessibility/
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Extending XML● By definition: eXtensible Markup Language● Geolocating RSS feeds
● http://georss.org/● http://www.w3.org/2003/01/geo/
● XHTML (sent as application/xhtml+xml) + Geo● etc
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Some sort of conclusion?● Considerations on how geo data is stored:
● In a separate file (KML)?● As part of your page (META, microformat, other)?● On a 3rd party site (Flickr)?
● How maintainable is it?● What's the value to the end-user?
● Browser tools● Site tools● Aggregators
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ThanksPatrick H. Lauke
http://www.salford.ac.uk
http://www.splintered.co.uk